Book Image

Raspberry Pi for Secret Agents - Third Edition

Book Image

Raspberry Pi for Secret Agents - Third Edition

Overview of this book

This book is for all mischievous Raspberry Pi owners who’d like to see their computer transform into a neat spy gadget to be used in a series of practical pranks and projects. No previous skills are required to follow along, and if you’re completely new to Linux, you’ll pick up much of the basics for free. We’ll help you set up your Raspberry Pi Zero, Raspberry Pi 2 and Raspberry Pi 3 and guide you through a number of pranks and secret agent techniques that are so inconspicuous yet high on mischief. You’ll learn how to configure your operating system for maximum mischief and start exploring audio, video, or Wi-Fi techniques. We’ll show you how to record, listen, or talk to people from a distance and how to set up your own phone network. Then, you’ll plug in your webcam and set up a motion detector with an alarm and find out what the other computers on your Wi-Fi network are up to. Once you’ve mastered the techniques, we’ll combine them with a battery pack and GPS for the ultimate off-road spy kit.
Table of Contents (7 chapters)

Protecting your network against Ettercap

By now you might be wondering if there's a way to protect your network against the ARP poisoning attacks we've seen in this chapter.

The most common and straightforward defense is to define static ARP entries for important addresses on the network. You could do this on the router, if it has support for static ARP entries, and/or directly, on each machine connected to the network:

Defining static ARP entries on a router running Tomato firmware

Most operating systems will display the ARP table with the arp -a command.

To turn a dynamic ARP entry for your router into a static entry in Windows, open a Command Prompt as Administrator and type in the following command, but replace [Router IP] and [Router MAC] with the IP and MAC address of your router:

C:\> netsh -c "interface ipv4" add neighbors
    "Wireless Network Connection" "[Router IP]"
    "[Router MAC]"

The Wireless Network Connection argument might need to be adjusted to match the name...